mirror of
https://github.com/node-red/node-red-nodes.git
synced 2023-10-10 13:36:58 +02:00
373 lines
14 KiB
JavaScript
373 lines
14 KiB
JavaScript
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module.exports = function(RED) {
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"use strict";
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var fs = require('fs');
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var spawn = require('child_process').spawn;
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var colours = require('./colours');
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var hatCommand = __dirname+'/sensehat';
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if (!fs.existsSync('/usr/lib/python2.7/dist-packages/sense_hat') && !fs.existsSync('/usr/lib/python3/dist-packages/sense_hat')) {
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throw "Error: Can't find Sense HAT python libraries. Run sudo apt-get install sense-hat";
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}
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if ( !(1 & parseInt((fs.statSync(hatCommand).mode & parseInt ("777", 8)).toString(8)[0]) )) {
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throw "Error: "+RED._("node-red:rpi-gpio.errors.mustbeexecutable");
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}
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// the magic to make python print stuff immediately
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process.env.PYTHONUNBUFFERED = 1;
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// Xaccel.x,y,z,gyro.x,y,z,orientation.roll,pitch,yaw,compass
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var HF_RE = /^X(.+),(.+),(.+),(.+),(.+),(.+),(.+),(.+),(.+),(.+)$/;
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// Ytemperature,humidity,pressure
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var LF_RE = /^Y(.+),(.+),(.+)$/;
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// K[U|L|R|D|E][0|1|2] - joystick event: direction,state
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var KEY_RE = /^K(.)(.)$/;
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var KEY_MAP = {
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"U":"UP",
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"D":"DOWN",
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"L":"LEFT",
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"R":"RIGHT",
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"E":"ENTER"
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};
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var HAT = (function() {
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var hat = null;
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var onclose = null;
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var users = [];
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var motionUsers = 0;
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var envUsers = 0;
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var reconnectTimer = null;
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var connect = function() {
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reconnectTimer = null;
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var buffer = "";
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hat = spawn(hatCommand);
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hat.stdout.on('data', function (data) {
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buffer += data.toString();
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var lines = buffer.split("\n");
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if (lines.length == 1) {
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return;
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}
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buffer = lines.pop();
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var m,msg;
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for (var i=0; i<lines.length; i++) {
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var line = lines[i];
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msg = null;
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if ((m = KEY_RE.exec(line)) !== null) {
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msg = {
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topic: "joystick",
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payload: {key: KEY_MAP[m[1]], state: Number(m[2])}
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}
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} else if ((m = LF_RE.exec(line)) !== null) {
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msg = {
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topic: "environment",
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payload: {temperature: Number(m[1]), humidity: Number(m[2]), pressure: Number(m[3])}
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}
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} else if ((m = HF_RE.exec(line)) !== null) {
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// Xaccel.x,y,z,gyro.x,y,z,orientation.roll,pitch,yaw,compass
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msg = {
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topic: "motion",
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payload: {
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acceleration: {
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x: Number(m[1]),
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y: Number(m[2]),
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z: Number(m[3])
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},
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gyroscope: {
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x: Number(m[4]),
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y: Number(m[5]),
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z: Number(m[6])
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},
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orientation: {
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roll: Number(m[7]),
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pitch: Number(m[8]),
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yaw: Number(m[9])
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},
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compass: Number(m[10])
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}
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}
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}
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if (msg && !onclose) {
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for (var j=0; j<users.length; j++) {
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var node = users[j];
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if (node.motion && msg.topic === "motion") {
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node.send(RED.util.cloneMessage(msg));
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} else if (node.env && msg.topic === 'environment') {
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node.send(RED.util.cloneMessage(msg));
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} else if (node.stick && msg.topic === 'joystick') {
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node.send(RED.util.cloneMessage(msg));
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}
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}
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}
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}
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});
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hat.stderr.on('data', function (data) {
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// Any data on stderr means a bad thing has happened.
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// Best to kill it and let it reconnect.
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if (RED.settings.verbose) { RED.log.error("err: "+data+" :"); }
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hat.kill('SIGKILL');
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});
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hat.stderr.on('error', function(err) { });
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hat.stdin.on('error', function(err) { });
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hat.on('close', function (code) {
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hat = null;
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users.forEach(function(node) {
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node.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
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});
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if (RED.settings.verbose) { RED.log.info(RED._("node-red:rpi-gpio.status.closed")); }
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if (onclose) {
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onclose();
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onclose = null;
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} else if (!reconnectTimer) {
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reconnectTimer = setTimeout(function() {
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connect();
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},5000);
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}
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});
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hat.on('error', function (err) {
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if (err.errno === "ENOENT") { RED.log.error(RED._("node-red:rpi-gpio.errors.commandnotfound")); }
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else if (err.errno === "EACCES") { RED.log.error(RED._("node-red:rpi-gpio.errors.commandnotexecutable")); }
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else {
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RED.log.error(RED._("node-red:rpi-gpio.errors.error")+': ' + err.errno);
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}
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});
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if (motionUsers > 0) {
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hat.stdin.write('X1\n');
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}
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if (envUsers > 0) {
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hat.stdin.write('Y1\n');
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}
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}
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var disconnect = function(done) {
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if (hat !== null) {
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onclose = done;
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hat.kill('SIGKILL');
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hat = null;
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}
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if (reconnectTimer) {
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clearTimeout(reconnectTimer);
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}
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}
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return {
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open: function(node) {
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if (!hat) {
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connect();
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}
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if (!reconnectTimer) {
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node.status({fill:"green",shape:"dot",text:"node-red:common.status.connected"});
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}
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if (node.motion) {
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if (motionUsers === 0) {
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hat.stdin.write('X1\n');
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}
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motionUsers++;
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}
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if (node.env) {
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if (envUsers === 0) {
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hat.stdin.write('Y1\n');
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}
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envUsers++;
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}
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users.push(node);
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},
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close: function(node,done) {
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if (node.motion) {
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motionUsers--;
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if (motionUsers === 0) {
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hat.stdin.write('X0\n');
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}
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}
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if (node.env) {
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envUsers--;
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if (envUsers === 0) {
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hat.stdin.write('Y0\n');
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}
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}
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users.splice(users.indexOf(node),1);
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if (users.length === 0) {
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disconnect(done);
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} else {
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done();
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}
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},
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send: function(msg) {
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if (hat) {
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hat.stdin.write(msg+'\n');
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}
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}
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}
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})();
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function SenseHatInNode(n) {
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RED.nodes.createNode(this,n);
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this.motion = n.motion;
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this.env = n.env;
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this.stick = n.stick;
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var node = this;
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node.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
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HAT.open(this);
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node.on("close", function(done) {
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HAT.close(this,done);
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});
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}
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RED.nodes.registerType("rpi-sensehat in",SenseHatInNode);
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function SenseHatOutNode(n) {
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RED.nodes.createNode(this,n);
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var node = this;
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node.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
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HAT.open(this);
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node.on("close", function(done) {
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HAT.close(this,done);
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});
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var handleTextMessage = function(line,msg) {
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var textCol = colours.getRGB(msg.color||msg.colour)||"255,255,255";
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var backCol = colours.getRGB(msg.background)||"0,0,0";
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var speed = null;
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if (!isNaN(msg.speed)) {
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speed = msg.speed;
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}
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var command = "T";
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if (textCol) {
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command += textCol;
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if (backCol) {
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command += ","+backCol;
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}
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}
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if (speed) {
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var s = parseInt(speed);
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if (s >= 1 && s <= 5) {
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s = 0.1 + (3-s)*0.03;
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}
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command = command + ((command.length === 1)?"":",") + s;
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}
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command += ":" + line;
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return command;
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}
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node.on("input",function(msg) {
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var command;
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var parts;
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var col;
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if (typeof msg.payload === 'number') {
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HAT.send(handleTextMessage(""+msg.payload,msg));
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} else if (typeof msg.payload === 'string') {
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var lines = msg.payload.split("\n");
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lines.forEach(function(line) {
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command = null;
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if ( /^(([0-7]|\*|[0-7]-[0-7]),([0-7]|\*|[0-7]-[0-7]),(\d{1,3},\d{1,3},\d{1,3}|#[a-f0-9]{3,6}|[a-z]+))(,([0-7]|\*|[0-7]-[0-7]),([0-7]|\*|[0-7]-[0-7]),(\d{1,3},\d{1,3},\d{1,3}|#[a-f0-9]{3,6}|[a-z]+))*$/i.test(line)) {
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parts = line.split(",");
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var expanded = [];
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var i=0;
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var j=0;
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while (i<parts.length) {
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var x = parts[i++];
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var y = parts[i++];
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col = parts[i++];
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if (/#[a-f0-9]{3,6}|[a-z]/i.test(col)) {
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col = colours.getRGB(col);
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if (col === null) {
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// invalid colour, go no further
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return;
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}
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} else {
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col += ","+parts[i++]+","+parts[i++];
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}
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if (x === '*') {
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x = "0-7";
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}
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if (y === '*') {
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y = "0-7";
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}
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var x0,x1;
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var y0,y1;
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if (x.indexOf("-") === -1) {
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x0 = x1 = parseInt(x);
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} else {
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var px = x.split("-");
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x0 = parseInt(px[0]);
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x1 = parseInt(px[1]);
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if (x1<x0) {
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j = x1;
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x1 = x0;
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x0 = j;
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}
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}
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if (y.indexOf("-") === -1) {
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y0 = y1 = parseInt(y);
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} else {
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var py = y.split("-");
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y0 = parseInt(py[0]);
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y1 = parseInt(py[1]);
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if (y1<y0) {
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j = y1;
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y1 = y0;
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y0 = j;
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}
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}
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x = x0;
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while (x<=x1) {
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y = y0;
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while (y<=y1) {
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expanded.push([x,y,col]);
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y++;
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}
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x++;
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}
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}
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if (expanded.length > 0) {
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var pixels = {};
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var rules = [];
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for (i=expanded.length-1; i>=0; i--) {
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var rule = expanded[i];
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if (!pixels[rule[0]+","+rule[1]]) {
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rules.unshift(rule.join(","));
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pixels[rule[0]+","+rule[1]] = true;
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}
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}
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if (rules.length > 0) {
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command = "P"+rules.join(",");
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}
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}
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}
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if (!command) {
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if (/^R(0|90|180|270)$/i.test(line)) {
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command = line.toUpperCase();
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} else if (/^F(H|V)$/i.test(line)) {
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command = line.toUpperCase();
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} else if (/^D(0|1)$/i.test(line)) {
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command = line.toUpperCase();
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} else {
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command = handleTextMessage(line,msg);
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}
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}
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if (command) {
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//console.log(command);
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HAT.send(command);
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}
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});
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}
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});
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}
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RED.nodes.registerType("rpi-sensehat out",SenseHatOutNode);
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}
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